#include "../include/muduo/proto/codec.h"
#include "../include/muduo/proto/dispatcher.h"
#include "../include/muduo/base/Logging.h"

#include "../include/muduo/base/Mutex.h"
#include "../include/muduo/net/EventLoop.h"
#include "../include/muduo/net/TcpServer.h"

#include "request.pb.h"
#include <iostream>
#include <functional>
#include <unordered_map>

class Server
{
public:
    typedef std::shared_ptr<google::protobuf::Message> MessagePtr;
    typedef std::shared_ptr<ppr::TranslateRequest> TranslateRequestPtr;
    typedef std::shared_ptr<ppr::AddRequest> AddRequestPtr;

    Server(int port)
        : _server(&_baseloop, muduo::net::InetAddress("0.0.0.0", port),
                  "Server", muduo::net::TcpServer::kReusePort),
          _dispatcher(std::bind(&Server::onUnknownMessage, this,
                                std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)),
          _codec(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher,
                           std::placeholders::_1, std::placeholders::_2, std::placeholders::_3))
    {
        //注册业务请求处理函数
        _dispatcher.registerMessageCallback<ppr::TranslateRequest>(std::bind(&Server::onTranslate,this,
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        _dispatcher.registerMessageCallback<ppr::AddRequest>(std::bind(&Server::onAdd,this,
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

        _server.setMessageCallback(std::bind(&ProtobufCodec::onMessage, &_codec,
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

        _server.setConnectionCallback(std::bind(&Server::onConnection, this,std::placeholders::_1));
    }

    void start()
    {
        _server.start();
        _baseloop.loop();
    }

private:
    std::string translate(const std::string &str) 
    {
        static std::unordered_map<std::string, std::string> dict_map = {
            {"hello", "你好"},
            {"Hello", "你好"},
            {"你好", "Hello"},
            {"吃了吗", "油泼面"}
        };
        auto it = dict_map.find(str);
        if (it == dict_map.end()) {
            return "没听懂！！";
        }
        return it->second;
    }
    void onTranslate(const muduo::net::TcpConnectionPtr &conn, const TranslateRequestPtr &message, muduo::Timestamp)
    {
        // 1.拿到数据
        std::string req_str = message->meg();
        // 2.翻译
        std::string resp_str = translate(req_str);
        // 3.组织protobuf的响应
        ppr::TranslateResponse resp;
        resp.set_meg(resp_str);
        // 4.发送响应
        _codec.send(conn,resp);
    }

    void onAdd(const muduo::net::TcpConnectionPtr &conn, const AddRequestPtr &message, muduo::Timestamp)
    {
        int num1 = message->num1();
        int num2 = message->num2();
        int result = num1+num2;
        ppr::AddResponse resp;
        resp.set_result(result);
        _codec.send(conn,resp);
    }

    void onUnknownMessage(const muduo::net::TcpConnectionPtr &conn, const MessagePtr &message, muduo::Timestamp)
    {
        LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
        conn->shutdown();
    }

    void onConnection(const muduo::net::TcpConnectionPtr& conn)
    {
        if(conn->connected()){
            LOG_INFO << "新连接建立成功！";
        }else {
            LOG_INFO << "连接即将关闭！";
        }
    }

private:
    muduo::net::EventLoop _baseloop;
    muduo::net::TcpServer _server;  // 服务器对象
    ProtobufDispatcher _dispatcher; // 请求分法器对象——要向其中注册请求处理函数
    ProtobufCodec _codec; // protobuf协议处理器——针对收到的请求数据进行protobuf协议处理
};

int main()
{
    Server svr(8080);
    svr.start();
    return 0;
}